Skin Hooks

Small single-ended handheld instruments with a fine sharp (or blunt) hook at the tip of a slender pencil-grip handle — designed for atraumatic, single-point traction on skin edges and wound margins without crush injury. The skin hook is among the oldest surgical instruments still in daily use — a design genealogy that runs from ancient bronze and iron hooks through the modern stainless-steel single-prong (Joseph, Guthrie, Gillies) and double-prong variants on every fine-reconstruction tray.^[1]

For reconstructive urology and urogynecology, the skin hook is the canonical instrument for cosmetically critical skin-edge handling — hypospadias / glansplasty, vulvar / introital reconstruction, Foldès clitoral reconstruction, penile-shaft cosmetic work, and any case where wound-edge viability and eversion drive the cosmetic outcome.^[4]

Design

• Working end: small curved hook (~ 2–5 mm depth from shaft to tip), typically a 90° or slightly greater bend.
• Tip variants:
  • Sharp single-prong — pointed tip penetrates the dermis for secure grip; the standard.
  • Blunt single-prong — rounded tip hooks tissue without piercing; lower sharps-injury risk.^[2]
  • Double-prong — two parallel hooks separated by 5–10 mm; distributes force over two points; more stable for wider / fragile edges.
• Handle: slender straight cylindrical rod, 12–16 cm (5–6.5 in), designed for pencil grip.
• Some handles hexagonal / octagonal in cross-section to prevent rolling off the field.
• Material: surgical-grade stainless steel; disposable variants exist.

Named Variants

Variant	Defining feature	Best fit
Joseph skin hook (Jacques Joseph, 1865–1934)	Fine sharp single-prong; rhinoplasty heritage	Fine facial / glanular / labial work
Guthrie	Single sharp prong, dermatologic handle profile	Dermatologic surgery, fine-skin work
Gillies (Sir Harold Gillies, 1882–1960)	Fine single sharp prong; plastic-surgery heritage	Reconstructive flap surgery
Frazier	Slightly larger hook	Neurosurgical / ENT applications
Double-prong	Two parallel hooks	Wider / fragile wound edges
Walton fish hook	Blunt wire hook + elastic-band traction	Semi-self-retaining retraction, head-and-neck dissection[3]
Retractable / safety hook	Retractable tip or protective sheath	Sharps-injury reduction

Mechanism — Single-Point Traction, No Crush

The skin hook's mechanism is fundamentally different from tissue forceps, and this is the entire clinical point:^[1]

1. Single-point engagement — the sharp tip is inserted into the dermis (not the epidermis alone, which would tear); engages a small volume of dermal collagen at a single point.
2. Traction without compression — unlike forceps that grasp by crushing tissue between two jaws, the hook applies traction from a single point without any crushing force. No dermal-microvasculature disruption; no wound-edge devitalization.
3. Wound-edge eversion — hooking into the dermis and pulling laterally + slightly upward everts the wound edge, exposing the deep surface of the dermis for inspection and precise edge-to-edge approximation during closure.
4. Retraction — single-edge retraction laterally, exposing the underlying tissue plane.

This no-crush mechanism is the reason the skin hook is preferred in cosmetically sensitive areas and flap surgery — the wound edge stays vascularized, the dermal microvasculature is preserved, and the cosmetic outcome is correspondingly better.

Reconstructive-Urology and Urogyn Uses

The skin hook is the everyday fine-skin-edge instrument for RU/urogyn cosmetic and reconstructive work:

Hypospadias and distal-urethral reconstruction

• Glanular and urethral-plate handling during TIP / TIPU / Mathieu / onlay-island-flap — fine traction on glanular wings, the urethral plate, inner-prepuce flaps without crushing fragile glanular tissue.
• Fistula-repair flap-tip manipulation during urethrocutaneous-fistula repair after hypospadias.

Glansplasty and glans reconstruction

• Glans-resurfacing, partial glansectomy, glanuloplasty — traction on glanular epithelium and sub-glanular flaps where forceps would crush fragile tissue.

Penile-shaft cosmetic and minor reconstructive work

• Inner-prepuce / preputial-skin handling during partial / radical circumcision revision, frenuloplasty, minor penile-skin reconstruction.
• Penile-shaft flap-tip manipulation during penile-disassembly procedures and complex penile reconstruction where flap-tip viability is paramount.

Vulvar and introital reconstruction

• Labiaplasty edge handling — fine traction on labial mucosa and skin during dissection and closure.
• Vestibulectomy, posterior-vestibuloplasty mucosal advancement, Foldès clitoral reconstruction, post-defibulation introital closure — wound-edge eversion for precise mucosal-skin approximation.

Microsurgical and microsurgery-adjacent

• Vasovasostomy / microsurgical varicocelectomy — scrotal-skin and dartos edges during the surgical approach (used in conjunction with microsurgical Castroviejo / Gerald instruments at the anastomotic line).
• Penile / genital replantation — recipient-vessel exposure where skin-edge traction matters.

Wound closure across RU/urogyn

• Wound-edge eversion during suturing — non-dominant hand holds the skin hook to evert the wound edge while the dominant hand drives the needle. The technique produces optimal wound eversion and superior cosmetic closure.^[4]

Office and ED genital procedures

• Meatotomy / meatoplasty, foreskin-injury repair, urethral-caruncle excision, condyloma excision, vestibular biopsy, vaginal-cyst marsupialization.

Skin-flap viability — the canonical use case

When manipulating a flap tip, the skin hook is the instrument of choice. Grasping a flap tip with forceps can crush it and compromise vascularity → flap-tip necrosis. The hook provides traction without compression, preserving flap-tip viability — a principle that extends across every reconstructive flap (scrotal flap, labial flap, Foldès, gracilis, perforator flaps).

Skin Hook vs Tissue Forceps — The Crush Question

Feature	Skin hook	Adson / fine tissue forceps
Mechanism	Single-point traction	Two-jaw compression
Crush injury	None	Moderate dermal crush
Wound-edge viability	Preserved	May be compromised
Wound-edge eversion	Excellent	Variable
Grip security	Moderate (can slip on thin dermis)	Excellent (firm two-jaw)
Sharps risk	Yes (sharp tip)	Minimal
Cosmetic outcome	Superior at the wound edge	Adequate; crush artifact possible
Best for	Facial / glanular / vulvar fine work, flap tips	General tissue, deep tissue, non-cosmetic edges

The crush-injury distinction is the reason the skin hook is the cosmetic-sensitive default. The Clark 2019 study found that 85.1% of dermatologic surgeons use skin hooks, with fellowship training the only statistically significant predictor of use.^[4]

Safety — Sharps Injuries

The sharp tip is the major occupational hazard. Survey data:^[5][6][7]

• 56.7% of dermatologic surgeons report at least one sharps injury within the past year; 85.1% within their career.^[5][7]
• 14.7% of sharps injuries result in a bloodborne exposure (suture needlesticks dominate the absolute numbers).^[7]
• 64% of dermatologists report having had an unreported sharps injury (underreporting is common).
• Skin hooks are specifically identified as a cause of percutaneous injury in dermatologic-surgery practice.^[6]

Mitigation

• Blunt skin hooks when sharp grip is not essential — LoPiccolo 2012 reported no exposures from blunt hooks during Mohs surgery on known hepatitis / HIV patients.^[2]
• Neutral-zone (hands-free) passing for instrument exchange.
• Retractable / sheathed skin hooks when available.
• Hook-tip awareness at all times during the procedure.
• Sharps-container disposal after use.

Limitations

• Tears through thin / fragile skin — atrophic skin (elderly, chronic steroid use, Ehlers-Danlos) — hook can pull through the dermis. Use tissue forceps or suture-based retraction instead.
• Single-point retraction only — broader retraction requires multiple hooks or a multi-pronged retractor (Senn, Volkmann).
• Handheld — requires continuous holding; for prolonged retraction switch to a self-retaining system (Lone Star, Walton fish hook elastic bands).^[3]
• Superficial only — not for deep tissue / muscle / viscera.
• Tissue-tearing risk under excessive force — particularly in thin / sun-damaged skin.

Technique

1. Pencil grip for maximum precision and fine control.
2. Engage the dermis, not the epidermis alone — epidermis tears; dermis holds.
3. Gentle steady traction — the goal is to displace the wound edge just enough to expose the underlying tissue or evert the edge for suturing; excessive force tears.
4. ~ 45° angle of insertion, then rotate to engage; bite of ~ 2–3 mm of dermis.
5. Use during suturing for wound-edge eversion: skin hook in non-dominant hand everts the edge while the dominant hand drives the needle. Produces superior eversion and precise edge-to-edge approximation.
6. Avoid repeated repositioning — each insertion creates a dermal puncture; minimize.
7. Pair with forceps complementarily — hooks at the cosmetically critical edges (facial / glanular / labial / flap tips), forceps at non-critical / deeper areas.
8. Two hooks for bilateral retraction — one surgeon, one assistant.
9. Flap-tip handling — always a hook, never forceps.

Comparison Within the Skin-Edge-Retraction Family

Instrument	Points of contact	Tissue trauma	Best fit
Single skin hook	1	Minimal	Delicate skin edges, flap tips, facial / glanular work
Double skin hook	2	Minimal	Wider / fragile edges; two-point distribution
Senn (Senn-Miller) rake	3	Low-moderate	Broader skin and superficial-muscle retraction
Volkmann rake	1–6	Low-moderate	Skin / muscle / periosteum in wider fields
Adson forceps (toothed)	2-jaw	Moderate (crush)	General skin and subcutaneous

Historical Context

The skin hook is among the oldest surgical instruments in continuous use. Ancient surgical texts from Egypt, Greece, and Rome describe bronze and iron hooks for wound retraction; Hippocrates, Celsus, and Galen referenced hooks in their surgical writings.^[1] The design has evolved from crude metalwork into the refined precision stainless-steel instruments of today, but the core concept — a sharp or blunt curved tip used to engage and retract tissue at a single point — has remained essentially unchanged for millennia. The Joseph (rhinoplasty), Guthrie (dermatologic), and Gillies (plastic-reconstructive) named variants reflect later refinements in handle and tip geometry for specific operative niches.

See also: Senn Retractor, Volkmann (Rake), Iris Forceps, Iris Scissors, Tenotomy Scissors, Lone Star Retractor.

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References

1. Kirkup J. "The history and evolution of surgical instruments. VII. Spring forceps (tweezers), hooks and simple retractors." Ann R Coll Surg Engl. 1996;78(6):544–52.

2. LoPiccolo MC, Balle MR, Kouba DJ. "Safety precautions in Mohs micrographic surgery for patients with known blood-borne infections: a survey-based study." Dermatol Surg. 2012;38(7 Pt 1):1059–65. doi:10.1111/j.1524-4725.2012.02395.x

3. Rogers SN, Davies ES. "An alternative method of intraoperative skin retraction: the Walton fish hook." Br J Oral Maxillofac Surg. 1995;33(5):323. doi:10.1016/0266-4356(95)90048-9

4. Clark S, Truong V, Stasko T. "Hooked on hooks? A study in the utilization of skin hooks." Dermatol Surg. 2019;45(1):74–9. doi:10.1097/DSS.0000000000001644

5. Talebi-Liasi F, Lewin JM. "A cross-sectional analysis of sharps injuries among dermatologic surgeons: a survey of American College of Mohs Surgery members." Dermatol Surg. 2023;49(11):985–8. doi:10.1097/DSS.0000000000003907

6. Kaspar TA, Wagner RF. "Percutaneous injury during dermatologic surgery." J Am Acad Dermatol. 1991;24(5 Pt 1):756–9. doi:10.1016/0190-9622(91)70116-j

7. Donnelly AF, Chang YH, Nemeth-Ochoa SA. "Sharps injuries and reporting practices of U.S. dermatologists." Dermatol Surg. 2013;39(12):1813–21. doi:10.1111/dsu.12352